added recipe_data() and crafting_remaining_item() - for convenient crafting scripts.

src/main/java/carpet/mixins/RecipeManager_scarpetMixin.java

@@ -0,0 +1,32 @@
+package carpet.mixins;
+
+import carpet.fakes.RecipeManagerInterface;
+import com.google.common.collect.Lists;
+import net.minecraft.recipe.Recipe;
+import net.minecraft.recipe.RecipeManager;
+import net.minecraft.recipe.RecipeType;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.registry.Registry;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+@Mixin(RecipeManager.class)
+public class RecipeManager_scarpetMixin implements RecipeManagerInterface
+{
+
+    @Shadow private Map<RecipeType<?>, Map<Identifier, Recipe<?>>> recipes;
+
+    @Override
+    public List<Recipe<?>> getAllMatching(RecipeType type, Identifier output)
+    {
+        Map<Identifier, Recipe<?>> typeRecipes = recipes.get(type);
+        if (typeRecipes.containsKey(output)) return Collections.singletonList(typeRecipes.get(output));
+        return Lists.newArrayList(typeRecipes.values().stream().filter(
+                r -> Registry.ITEM.getId(r.getOutput().getItem()).equals(output)).collect(Collectors.toList()));
+    }
+}